/**
 * Mermaid `flowchart TD` renderer for the visualization IR.
 *
 * Output is a self-contained code block — paste it into a markdown
 * file, GitHub PR description, or mermaid.live and it renders.
 */
import type { VizNode } from "./ir.js";
export interface MermaidOptions {
    /** Include tool nodes attached to agents. Defaults to `true`. */
    showTools?: boolean;
    /** Include sub-agent transfer edges. Defaults to `true`. */
    showTransfers?: boolean;
    /** Wrap output in a fenced ```mermaid``` block. Defaults to `false`. */
    fenced?: boolean;
}
/** Render a VizNode tree to a Mermaid `flowchart TD` source string. */
export declare function renderMermaid(node: VizNode, opts?: MermaidOptions): string;
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